<template>
    <div style="background-color: aqua;">
        {{ message }}
        <button @click="greet()">问候</button>
    </div>
</template>
<script>
export default {
    data() {
        return {
            message:'hello,friend!'
        }
    },
    methods: {
        greet(){
            this.message='hello'+this.$attrs.name+'!'
        }
    },
}
</script>